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Can’t be opened because the identity of the developer cannot be confirmed Fix

May 17, 2015

I have seen this Mac problem quite long time ago, and I keep forgetting how I fix it whenever I have it again and again.

At this time, with Yosemite OS X, I downloaded an update .dmg file from LibreOffice, and when I wanted to open the application, it did say, can’t be opened because the identity of the developer cannot be confirmed.

I was able to install the .dmg file, but could not open the application once it was installed.

What is this “Can’t be opened because the identity of the developer cannot be confirmed”

The message itself, “Can’t be opened because the identity of the developer cannot be confirmed” is actually telling us, that the developer of this application is not listed or registered in Apple developer database.

The message

This does not necessary mean that the application is bad or corrupt, but it is good that your Mac ‘s Gatekeeper refuses to open it, so you can be careful on what application you are going to open.

There are two conditions you probably will see this message, before or after installation. If you see this right before you want to install the .dmg or any extension files, you can right click the .dmg file, and choose “Open“. Enter your Mac password and it will be installed. Below is what you need to do if you can install it but you cannot open the app.

How to fix or to run the application after installation?

As far as I know, there are 2 ways fixing this to run the application that is blocked by Gatekeeper, but please be sure, that the application is safe. If necessary, do some researches first about the application you want to open.